/*
 * @Copyright (c) 2018 缪聪(mcg-helper@qq.com)
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");  
 * you may not use this file except in compliance with the License.  
 * You may obtain a copy of the License at  
 *     
 *     http://www.apache.org/licenses/LICENSE-2.0  
 *     
 * Unless required by applicable law or agreed to in writing, software  
 * distributed under the License is distributed on an "AS IS" BASIS,  
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  
 * See the License for the specific language governing permissions and  
 * limitations under the License.
 */

package com.mcgrobot.config;

import javax.servlet.http.HttpSession;
import javax.websocket.HandshakeResponse;
import javax.websocket.server.HandshakeRequest;
import javax.websocket.server.ServerEndpointConfig;

import org.apache.catalina.session.StandardSessionFacade;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.socket.server.standard.ServerEndpointExporter;

@Configuration
public class WebSocketConfig extends ServerEndpointConfig.Configurator {

    @Bean
    public ServerEndpointExporter serverEndpointExporter() {
        return new ServerEndpointExporter();
    }

	@Override
	public void modifyHandshake(ServerEndpointConfig sec, HandshakeRequest request, HandshakeResponse response) {
        /*如果没有监听器,那么这里获取到的HttpSession是null*/
        StandardSessionFacade ssf = (StandardSessionFacade) request.getHttpSession();
        if (ssf != null) {
            HttpSession session = (HttpSession) request.getHttpSession();
            sec.getUserProperties().put("httpSessionId", session.getId());
        }
		super.modifyHandshake(sec, request, response);
	}
    
}
